Table 2 Positive site-specific selection identified with CodeML models, BUSTED and MEME, and MrBayes

M1a^a

− 3068.35

p₀ = 0.606, p₁ = 0.394

ω₀ = 0.128, ω₁ = 1

NA

M2a^a

− 2985.41

p₀ = 0.379, p₁ = 0.366, p₂ = 0.255

ω₀ = 0.073, ω₁ = 1, ω₂ = 4.138

1, 3, 10, 12, 13, 22, 28, 35, 40, 42, 44, 45, 46

M7^a

− 3052.97

p = 0.171, q = 0.184

NA

M8^a

− 2984.37

p₀ = 0.749, p₁ = 0.251, p = 0.194

q = 0.219, ω = 3.767

1, 3, 10, 12, 13, 22, 28, 35, 40, 42, 44, 45, 46

Constrained^b

− 2885.7

p₁ = 0.369, p₂ = 0, p₃ = 0.631

ω₁ = 0, ω₂ = 0.54, ω₃ = 1

NA

Unconstrained^b/MEME

− 2805.1

p₁ = 0.351, p₂ = 0.543, p₃ = 0.106

ω₁ = 0.37, ω₂ = 0.37, ω₃ = 43.67

1, 3, 5, 12, 13, 16, 21, 22, 35, 36, 39, 42, 44, 45, 46, 47

MrBayes

p₋ = 0.356, p_N = 0.359, p₊  = 0.284

ω₋ = 0.082, ω_N = 1, ω₊ = 4.577

1, 3, 13, 22, 28, 35, 36, 42, 45, 46